Larger Image tcf7 (transcription factor 7 (T-cell specific, HMG-box) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 32, lateral view, anterior left, dorsal up. Image published in: Day RC and Beck CW (2011) Copyright ©2011 Day and Beck; licensee BioMed Central Ltd. Creative Commons Attribution license
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